Objectives refraction measuring apparatus

Details Objectives refraction measuring apparatus Objectives refraction measuring apparatus

1997-08-15

1998-12-01

Mai, Huy

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 351239, A61B 310

Patent

active

058446605

ABSTRACT:
An objective refraction measurement apparatus includes a separate chart having a pair of charts arranged separately, an optical system for projecting the separate chart to an eye to be examined through a focusing lens and a diaphragm having a pair of through holes arranged corresponding to the separate arrangement of the pair of charts, an operating unit for performing focusing operation to the eye, and a control unit for moving the focusing lens on the basis of the focusing operation along the optical axis direction by the operating unit to obtain the projection images of the pair of charts in the separate chart to the eye in an identical condition or a non-identical condition, thereby to perform a subjective measurement of the eye.

REFERENCES:
patent: 5594512 (1997-01-01), Yoneda et al.

Affiliated with

Also associated with

Rating

Objectives refraction measuring apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Objectives refraction measuring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Objectives refraction measuring apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2399727